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This post was last edited by 955559 on 2017-7-21 at 22:34. [Daily Question No. 103] On 2017.04.13, after the heating furnace was shut down normally, what was the purpose of blowing steam into the furnace chamber? A. Cooling down B. Replacing flue gas C. Purging the air preheater D. Preventing flash explosions. The reference answers can be seen after responding; scoring is possible by identifying the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) D Rating Criteria: 2 Wealth points for incorrect attempts; 3–8 points for *incomplete* answers. 10 Wealth points for correct answers accompanied by detailed explanations; 15–20 Wealth points for correct answers with additional *insufficient* details. Please use these criteria for scoring. 2017 Q&A Summary Thread (updates starting now) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates starting now) http://bbs.hcbbs.com/thread-1657794-1-1.html 2016 Q&A Summary Thread (updates completed) http://bbs.hcbbs.com/thread-1597792-1-1.html Petrochemical Sector – “Creative Ideas for Energy Saving” campaign (sponsors sought; highest returns ever) http://bbs.hcbbs.com/thread-1666758-1-1.html Sponsors are being sought for this campaign; those interested can contact the event organizer. (Sponsors of the event are entitled to the policy allowing them to include promotional ads as sponsors in various events held in the petrochemical region for one year.) The Petrochemical Deep Processing Edition – the event to share pictures of chemical processing equipment has begun! A vast amount of wealth, along with HChuan coins, is waiting for you to claim it: http://bbs.hcbbs.com/thread-1760733-1-1.html. Notice regarding the collection of chemical engineering technical materials in the “Petroleum and Chemicals Section”: http://bbs.hcbbs.com/thread-1614796-1-1.html (Source: HChuan Chemicals Forum)